The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1887-07-23
SCIENCE AND INDUSTRY.

"A machine has been invented that
will sew on 5000 buttons in day.
During the year 1886 American
mills produced 1,350,O0 tons 0f steel
rails, valued at $40, 100000. The pros
pect for 1887 is still better. Pittsburgh
POSI-
The West Lebanon (PenD.) Rolling
Mill Company has shipped chain
weighing twenty-five tons for use on
five-mast lake schooner. 1t requires
two cars to carry 1t.
"A recent computation makes the
velocity of the solar system in space
only about 10000, 900 miles year. BY
n different method another computer
has determined the rate to be about
525, 100000 miles a year. .-ArkansaW
Traveller.
"A Russian physicist finds that. con-
trary to general belief, the strength
and property Of elongation are in
creased by low temperature in iron
and steel, the force of cohesion being
intensified by contraction. 10
Trdreler.
"A Birmingham (Eng.) firm are
making oar-blades of the best sheet
steel, highly tempered. These are de-
clared to be much stronger than the
ordinary wooden blades and. being
much thinner, enter and leave the
water cleaner They are strongly fit
ted to wooden handles.
"A st. Augustine, Ga, letter de-.
scribes the ice works at that place us
having capacity of 1000 pounds per
hour. The freezing cans make mass
of 200 pounds each, and are taken out
in rotation, an average of five hourly,
after thirty-six hours exposure to the
evaporation OF ammonia, 240 cans be-
| ing kept at work. k.-Boston Budget.
Last year Qss6) the spots on the
sun were so small and few that it may
| have been the minimum of the sun
spot period Of eleven years. So says
the distinguished Italian astronomer.
Prof. Tacchini. From the 31st of Oc-
tober to the 18th of December there
were only six days when any trace of q
spot could be discovered on the solar
disc, and only n single tiny spot could
be observed on those days.-N. Y. Led
ger.
The process of taking beautiful
colored photographs has recently been
perfected by an English photographer.
A negative of the sitter is taken by i
sentitized plate of electric light. From
the negative positive is produced on
II chemically-treated basis by the aid Of
Il solar camera and spectroscopic ar
rangement. The image il produced in
colors without the aid of hand-work or
brush. Chicago AdUance.
| "A movement mas been started to
found laboratory on the New En-
gland coast, where students, teachers.
and investigators may find facilities
for the pursuit of biology. 1t is now
some years since the brief episode of
the Penikese laboratory, which was
founded by Mr.. Anderson and intrusted
to Professor Agassz. During the in
terval, summer schools of science have
multiplied, and few of them have sue
cessfully maintained their modest use
fulness.-Pubhc Opinion.
1t is said that a woman began the
manufacture of sewing thread in En-
gland in 1922, and it would seem
proper that the idea should have first
come from that sex through whose
hands nine-tenths of the thread passes
that is used. Paisley has the honor of
being the first town that embarked in
the business. 1t was called "Nun's
thread" was made of flax, and so
rapidly increased in popularity that it
was not long before it became all inn
portant branch of manufacture.